It seems to have summed together the 6 audio streams from the source and mixed them in to the first 2 channels of the output and left the remaining 6 empty. I thought this worked, because the output file had 8 audio streams, however I brought it in to editing software and discovered that unfortunately it actually had only 2 streams with any audio in them and the audio was clipping. I did so using ffmpeg -i input.mxf -vcodec copy -acodec copy -map 0 -timecode '09:59:30:00' output.mxf

The timecode is incorrect on the file and I want to fix it. It must match particular specifications, which state it must have 6 audio streams and 2 empty ones to total 8. For any others that are interested, the correct syntax is:įfmpeg -i in.mp4 -vcodec copy -c:a copy -map 0 out.I have a video file with 8 audio streams. Statistics: 153350 bytes read, 2 seeksĮdit 2 (solved): I managed to find the correct syntax from this ticket. Output from FFmpeg:Įdit: Output from ffmpeg -v 9 -loglevel 99 -i in.mp4: Out.mp4 (which should be identical to in.mp4) contains only 2 streams:įFmpeg does appear to correctly identify all 3 streams, but doesn't copy all of them over. After hours of searching online, it appears this should copy all streams ( as shown in example 4 here): I'm having trouble getting ffmpeg to copy all audio streams from a.

Ffmpeg copy audio streams